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pot plant seedling

The flowering stage is the final stage of growth for a cannabis plant. This is when plants start to develop resinous buds and your hard work will be realized. Most strains flower in 8-9 weeks, but some can take even longer, especially some sativas.

Vegetative stage length: 3-16 weeks

The growth stages of marijuana can be broken down into four primary stages from seed to harvest:

Flowering stage

The biggest variability in how long a marijuana plant takes to grow will happen in the vegetative stage—after the seedling phase and before flowering.

Once your seed has germinated, or sprouted, it’s ready to be placed in a growing medium, like soil. The tap root will drive down while the stem of the seedling will grow upward.

If you’re growing weed indoors, you can grow whenever you like. Keep in mind that the outside environment will affect your grow space—you may need to add heaters in the winter or fans and ACs in the summer. Other than that, you can start seeds whenever you like and flip them into flower whenever you like, depending on how big you want the plants.

If you’re growing indoors, you can force a weed plant to flower after only a few weeks when it’s small, or after several weeks when it’s big. If you’re growing outdoors, you’re at the whim of the seasons and will have to wait until the sun starts to go down in fall for it to flower and then to harvest.

Most blogs and forums will tell you that your plants are ready to veg after two weeks, but that’s far from true; it usually takes about 3–4 weeks from germination for your seedling to use up all the energy stored in the seed, although some plants develop faster than others. But rather than going by time, we recommend you transplant and start vegging your seedlings once they’ve developed at least three nodes and 4–5 sets of true leaves.

Unfortunately, by the time your seedlings show the first signs of damping off (a limp and discoloured stem), there’s nothing you can do to save them. We just recommend removing the affected seedlings from your grow room or propagator ASAP to avoid spreading the fungi.

Once you’ve transplanted your seedlings into their new pots, give them 3–7 days to adjust. Remember, transplanting is a stressful process, and your plants will need some time to recover from it. Feed your plants too early after transplanting, and they likely won’t take up all their nutrients from their medium, which can cause problems (like nutrient lockout) further down the line.


Once water enters a seed, it activates special enzymes that trigger the growth of the taproot (the small white root that pops out of seeds when germinated properly). This root starts to push deeper underground in search of more water while the seed sends a shoot up and out of the soil in search of light.

Inside that dark, hard shell, cannabis seeds house all the necessary genetic information to sprout and grow into big, luscious plants. When exposed to humidity and warmth, seeds are able to absorb water from their environment. This process is known as imbibition, and it’s the key to life for all plants.

When it comes to picking pots, we recommend the following approaches for autoflowering and feminized seedlings.

Cannabis seeds need four things in order to germinate: moisture, warmth, darkness, and time. To ensure you grow healthy seedlings, germinate your seeds using one of the following techniques.

If the coloring fails to disappear, and more and more leaves with fragile stems keep emerging, the reason could be excess nitrogen, which will lead to lower yields. The best solution is to thoroughly cleanse the root zone by overwatering your plants.

The color of your plants can say a lot about their health. Sometimes stems turn purple, and this might be down to multiple factors. It could be a matter of genetics. Or it could be the temperature. Just make sure the air temperature doesn’t go lower than 68°F. Otherwise, you risk getting purple stems.

First things first: root growth stimulation is a very important process. Poorly developed roots will be unable to absorb the necessary amount of nutrients to thrive and produce generous harvests. To prevent this from happening, during the 1st and 2nd weeks, you’ll have to pour some root booster into the irrigation water.

Fertilization? Yes, but with caution

Temperature has also an effect on our plant’s growth: if over 80°F, our kids will start to grow upwards. Be careful with environmental stress too for stressful situations such as plant transplants can cause them to become too flimsy and leggy. Seedlings react to stress or uneasiness (when they’re not happy with the substrate they’re growing in or aren’t receiving the right amount of nutrients) by stretching out. Be particularly vigilant in this regard.

– Instead, if your newborn seedlings seem unable to grow upwards because they’re either too weak or too fragile, you can use a vertical support to help them out. A slight breeze will also make shoots stronger and more resistant because plants are forced to focus their energies on the reinforcement rather than on the stretching. This means that plants will continue growing vigorously yet not so much upwards.

The first stage is as quick as it is beautiful: right after germination, the embryo emerges through the seed coat and turns into a tiny root when sowed. As it receives nourishment and moisture, the little seedlings start to appear. In botany, this stage is known as the stage of development, and it extends from the germination and subsequent emergence of the cotyledon (two round-shaped primary leaves) to the unfurling of the first true leaves (a set of jagged leaflets). These plants are still rather fragile and spindly, and many inexperienced growers fail to properly analyze the needs of the newborn seedlings, sometimes even causing them to die.

– Shoots also have a strong survival instinct. In the same way as roots reach out for nutrients, shoots grow towards the light. This phenomenon is called positive phototropism, and auxins play a major part in it. So, if your plant shows an exaggerate vertical growth, it may be suffering from stress due to an absence of a strong light source.